Smart Window Goes Clear Or Opaque In Seconds
A new smart window system for use in green homes and buildings can go from 100% opaque to almost completely clear in seconds. According to its creators, the new smart window overcomes previous drawbacks to such systems, including lower cost, long-term performance and non-toxic manufacturing processes.
Ho Sun Lim, Jeong Ho Cho, Jooyong Kim and Chang Hwan Lee... discovered that using a polymer, so-called "counterions" and a solvent such as methanol was an inexpensive and less harsh way to make a stable, robust smart window. It has the added advantage of being extremely tunable — quickly and easily switching from 100% opaque to almost completely clear in seconds.
"To our knowledge, such extreme optical switching behavior is unprecedented among established smart windows," the authors state. "This type of light control system may provide a new option for saving on heating, cooling and lighting costs through managing the light transmitted into the interior of a house."
(Smart window details)
Smart windows that can reversibly alternate between extreme optical characteristics via clicking counteranions of different hydration energies were developed on glass substrates through the facile spray-casting of poly[2-(methacryloyloxy)ethyltrimethylammonium chloride-co-3-(trimethoxysilyl)propyl methacrylate]. The optical transmittance was either 90.9% or 0% over the whole spectral range when alternately immersed in solutions containing thiocyanate (SCN–) or bis(trifluoromethane)sulfonimide (TFSI–) ions, respectively. The extreme optical transitions were attributed to formation of microporous structures via the molecular aggregation of polyelectrolyte chains bearing TFSI– ions in methanol. Because the smart windows were either highly transparent toward or completely blocking of incident light upon direct counterion exchange, this kind of nanotechnology may provide a new platform for efficiently conserving on energy usage in the interior of buildings.
( Counterion-Induced Reversibly Switchable Transparency in Smart Windows )
SF fans may recall the polawindows from Frank Herbert's 1972 novel The Godmakers:
Orne returned to his room to change for dinner, stopped at the polawindow, which he tuned to clear transmission.
Scroll down for more stories in the same category. (Story submitted 9/21/2011)
Follow this kind of news @Technovelgy.
| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
you like to contribute a story tip?
Get the URL of the story, and the related sf author, and add
Comment/Join discussion ( 1 )
Related News Stories -
3D Printed Dubai Building Is World's Largest
'This thing will start at one end of ...a house and build it complete to the other end, following drawings only.' - Murray Leinster, 1945.
Driverless Hotel Rooms Predicted In 1828
'Did you never see a moving house before?' - Jane Webb Loudon, 1828.
Humans Could Take Up A LOT Less Space
We'd have a lot more room for gardening...
Oh Yes, We're Building The Rotating Tower In Dubai
'Give me an old-fashioned tetragon on a central pivot every time.' - Frank Herbert, 1972.
Technovelgy (that's tech-novel-gee!)
is devoted to the creative science inventions and ideas of sf authors. Look for
the Invention Category that interests
you, the Glossary, the Invention
Timeline, or see what's New.
Sci-Fi Helps Young Readers Build Resiliency
'Reading science fiction and fantasy can help readers make sense of the world.'
I Want My 1928 Telestereo Hologram Now
'Instantly there appeared standing upon the disk, the image of a man...'
Memes Now Come From Neural Nets
'Your order said for him to be able to be able to work out twists on the gags in the file...'
Robot Dog Learns To Be Doggy From Real Dogs
'So we took pictures of Guzub making a Three Planets, and I could construct this one to do it exactly right down to the thousandth of a second.'
Unwanted Cruise Ships Huddle Together Out At Sea
'On the screen they passed in an endless, boundaryless flood of green specks...'
Sono Sion Electric Car Charges As You Drive
'It drew its power from six square yards of sunpower screens on its low curved roof.'
News Mood Filter Web Extension
'He adjusted the n, the r and b knobs, and hopefully anticipated a turn for the better...'
Fetal Lamb Rests In Artificial Womb
'... stewing warm on their cushion of peritoneum and gorged with blood-surrogate and hormones, the foetuses grew and grew...'
MIT Wants To Catch Interstellar Visitors
'INVESTIGATE MYSTERIOUS OBJECT ENTERING NEW CALEDONIA SYSTEM FROM NORMAL SPACE'
AutoX Sets Up Asia's Largest Robotaxi Center
'The robot cab seemed to know where it was going and, no doubt, the master machine from which it received its signals knew.'
E - Ink's Automatic Self Styling Color-Changing Dress
'The racks of gowns itched and quivered, their colors running into blurred pools.'
Soft Robots Use Kirigami Piezoelectric Sensor Skin
'A worthy opponent was the golem.'
Bosch Smartglasses Laser Paints AR Image On Your Retina
'Soon we'll be testing a system that projects directly on the retina of the eye.'
Maybe We Could Hibernate Until The Covid-19 Pandemic's End
'Cold-rest was a common last resort therapy for functional psychoses.'
Workplace Monitoring Hell, I Mean, Tool For Safe Distancing
'And here is the weirdest part -- I never see another employee the entire day.'
Patent Office Says AIs Cannot Be Inventors
'The real smart ones are as smart as the Turing heat is willing to let 'em get.'
More SF in the News Stories
More Beyond Technovelgy science news stories